6'5" 260lbs
As Dan90210 mentioned, I have a PA12 and love it.
My first kayak was a 10foot Lifetime Manta, and I still have it for friends and family. It has a 500lb capacity and is extremely stable (also very slow). It was a great value (purchased for $299 when Sports Authority was closing them out)
If I were to get my first kayak today, I'd take a good look at the Perception Striker.
I can guess that it will be very stable and also slow.
I really enjoyed experimenting with lots of DIY modifications with my first, cheap kayak.
It's a good way to learn from mistakes.
With the PA 12, the only modifications I've done are fish finder, bilateral anchor trolleys, and simple anchoring systems.